FIELD: control or safety systems or apparatus, particularly air flow regulation means.
SUBSTANCE: device comprises body with the first wall having curvilinear surface and valve installed in the wall and made as gate with lever and weight. Lever and weight have axes secured to body wall, which is opposite to body wall having curvilinear surface. Body walls have profiled surfaces in working valve gate area.
EFFECT: increased reliability.
4 cl, 1 dwg
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SU1260644A1 |
